JuMP-dev 2026 will be held Sunday, May 31 and Monday June 1, 2026 in Edinburgh, Scotland. This is the weekend prior to SIAM OP26, which will be held June 2-5, 2026 in Edinburgh, Scotland. JuMP-dev will be co-located with the 2026 HiGHS Workshop. Outline The purpose of JuMP-dev is to bring together students, researchers, and practitioners with interests in the methodological, algorithmic, and software aspects of JuMP and related packages. In particular, we invite new contributors and those who have not met the core development team. All participants will uphold the JuMP Code of Conduct. How do I give a talk? Similarly to previous years, we invite participants to present work related to JuMP. Submit a talk for JuMP-dev 2026 We especially seek talks about JuMP applications and providing feedback on the user-experience of using JuMP in industry and teaching. Speakers are encouraged to highlight the challenges faced and lessons learned, not only successes. Talks should be aimed at a general audience, but familiarity with JuMP/Julia can be assumed. If you have an idea for a talk and are not sure if it will be of interest, ask the program committee by writing to jump-dev-2026@googlegroups.com. See the previous workshops for examples of accepted talks: 2017, 2018, 2019, 2021, 2022, 2023, 2024, and 2025. Venue JuMP-dev will be held at the John McIntyre Conference Centre. There are a wide range of accommodation options within walking distance. Program committee Oscar Dowson (Program chair) Joaquim Dias Garcia (Soma Energy) Benoît Legat (UCLouvain) Julian Hall (University of Edinburgh; local organization) Ivet Galabova (University of Edinburgh; local organization)